refactor: move tab path sync into store integration

[hhhjin]

Summary

• move workspace-owned tab path cleanup, rename, and move side effects into a dedicated store integration
• emit narrow tab-path events from workspace actions and wire the store to react through registerTabPathIntegration
• update store action and integration tests to cover delete, rename, move, edit-mode rename, and cross-workspace ignore behavior

Review

• review gate found no actionable issues in the reviewed store scope

Testing

• pnpm lint:fix
• pnpm -C packages/store test

Notes

• left untracked todos/store-followup-prs.md out of this PR on purpose

[gemini-code-assist]

Code Review

This pull request centralizes tab and history synchronization by introducing a registerTabPathIntegration that listens for workspace events, replacing direct port calls in action files. This change ensures that tab paths and history are updated consistently when files are removed, renamed, or moved within a workspace. A bug was identified in the structure-actions.ts fallback logic where the tab history is not updated when a workspace is absent, which could lead to broken navigation.